1979 Mercedes Benz Unimog 416 - front Axle - Photo 11727317

The Unimog's portal axles are extremely stout, largely in part because they transfer the workload through internal gear reduction. As the driveshaft spins, it rotates the 3.14 ratio ring-and-pinion, which sends power to the 2.07 gears in the portal boxes, thus creating an end ratio of 6.52.